Timer 1 ELDT1C bit (bit 4 of T1CNT)

[jvsTSX]

when ELDT1C is cleared the PWM still updates, according to the datasheet and some tests it should behave as:
Clear (0): T1 Low will strictly use the value that was last written in T1 Low Compare before the timer was enabled, writing to T1LC afterwards will result in the value being written but not being updated untill T1CNT is cycled on and off
Set (1): T1 Low will update the value automatically after a period (or longer?) completes
This behaviour is present on both mode 1 and mode 3

[gyrovorbis]

Will make sure to fix this inaccuracy in the next release... thanks for confirming on real HW... the documentation for ELDT1C is basically worthless... lol.

[gyrovorbis]

I believe our own internal HW docs/Doxygen also needs to be updated for this field as well...

[jvsTSX]

Further testing results: when on mode 1 the PWM comparator is updated as soon as its respective counter finishes, but on mode 3 both T1L and T1H comparators only update when T1H finishes counting, somewhat like in this diagram

[RikkiGibson]

I think this is related to why pacman sound doesn't work in most/all emulators. I don't fully understand how yet. But as far as I could tell pacman never sets ELDT1C ever.